#include <iostream>

const int ArSize = 8;

int sum_arr(const int * begin, const int * end);

int main(...){
	using namespace std;

	int cookies[ArSize] = {1,2,4,8,16,32,64,128};

	int sum = sum_arr(cookies, cookies + ArSize);
	cout << "Total cookies eaten: " << sum << endl;
	
	sum  = sum_arr(cookies, cookies + 3);
	cout << "First three eaters ate " << sum << endl;

	sum = sum_arr(cookies + 4, cookies+8);
	cout << "Last four eater ate " << sum << endl;

	return 0;
}

int sum_arr(const int * begin, const int * end){
	const int * pt;
	int total = 0;
	for (pt = begin; pt != end; pt++)
		total += *pt;
	return total;
}